Which of the following is the first change that occurs to the zygote a – McqOptions

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1.	Which of the following is the first change that occurs to the zygote after fertilisation?
A.	It divides to form a hollow ball of cells, called the blastocyst.
B.	It begins to secrete the hormones.
C.	It contacts the endometrial wall of the uterus and becomes buried inside it.
D.	It initiates the formation of a placenta.
Answer» B. It begins to secrete the hormones.

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